/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */
using System;
using Velocity4Net.Ctx;
namespace Velocity4Net.Runtime.Parse.AST
{

    /**
     * Handles number addition of nodes.<br><br>
     *
     * Please look at the Parser.jjt file which is
     * what controls the generation of this class.
     *
     * @author <a href="mailto:wglass@forio.com">Will Glass-Husain</a>
     * @author <a href="mailto:pero@antaramusic.de">Peter Romianowski</a>
     * @author <a href="mailto:jvanzyl@apache.org">Jason van Zyl</a>
     * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
     * @version $Id: ASTAddNode.java 712887 2008-11-11 00:27:50Z nbubna $
     */
    public class ASTAddNode : ASTMathNode
    {
        /**
         * @param id
         */
        public ASTAddNode(int id)
            : base(id)
        {
        }

        /**
         * @param p
         * @param id
         */
        public ASTAddNode(Parser p, int id)
            : base(p, id)
        {
        }

        //@Override
        protected override Object HandleSpecial(Object left, Object right, InternalContextAdapter context)
        {
            /*
             * shall we try for strings?
             */
            if (left is String || right is String)
            {
                if (left == null)
                {
                    left = jjtGetChild(0).Literal();
                }
                else if (right == null)
                {
                    right = jjtGetChild(1).Literal();
                }
                return left.ToString() + right.ToString();
            }
            return null;
        }

        public override decimal Perform(decimal left, decimal right, InternalContextAdapter context)
        {
            return left + right;
        }

    }




}
